CVE-2021-25748 (GCVE-0-2021-25748)
Vulnerability from cvelistv5 – Published: 2023-05-24 00:00 – Updated: 2025-01-16 21:23
VLAI?
Title
Ingress-nginx `path` sanitization can be bypassed with newline character
Summary
A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use a newline character to bypass the sanitization of the `spec.rules[].http.paths[].path` field of an Ingress object (in the `networking.k8s.io` or `extensions` API group) to obtain the credentials of the ingress-nginx controller. In the default configuration, that credential has access to all secrets in the cluster.
Severity ?
7.6 (High)
CWE
- CWE-20 - Improper Input Validation
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Kubernetes | Kubernetes ingress-nginx |
Affected:
unspecified , < 1.2.1
(custom)
|
Credits
Gafnit Amiga
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T20:11:28.404Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://groups.google.com/g/kubernetes-security-announce/c/avaRYa9c7I8"
},
{
"tags": [
"x_transferred"
],
"url": "https://github.com/kubernetes/ingress-nginx/issues/8686"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2021-25748",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-01-16T21:23:23.823577Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-01-16T21:23:39.341Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Kubernetes ingress-nginx",
"vendor": "Kubernetes",
"versions": [
{
"lessThan": "1.2.1",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Gafnit Amiga"
}
],
"datePublic": "2022-06-10T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use a newline character to bypass the sanitization of the `spec.rules[].http.paths[].path` field of an Ingress object (in the `networking.k8s.io` or `extensions` API group) to obtain the credentials of the ingress-nginx controller. In the default configuration, that credential has access to all secrets in the cluster."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 7.6,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "CWE-20: Improper Input Validation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-05-24T00:00:00.000Z",
"orgId": "a6081bf6-c852-4425-ad4f-a67919267565",
"shortName": "kubernetes"
},
"references": [
{
"url": "https://groups.google.com/g/kubernetes-security-announce/c/avaRYa9c7I8"
},
{
"url": "https://github.com/kubernetes/ingress-nginx/issues/8686"
}
],
"source": {
"defect": [
"https://github.com/kubernetes/ingress-nginx/issues/8686"
],
"discovery": "EXTERNAL"
},
"title": "Ingress-nginx `path` sanitization can be bypassed with newline character",
"x_generator": {
"engine": "Vulnogram 0.0.9"
}
}
},
"cveMetadata": {
"assignerOrgId": "a6081bf6-c852-4425-ad4f-a67919267565",
"assignerShortName": "kubernetes",
"cveId": "CVE-2021-25748",
"datePublished": "2023-05-24T00:00:00.000Z",
"dateReserved": "2021-01-21T00:00:00.000Z",
"dateUpdated": "2025-01-16T21:23:39.341Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://groups.google.com/g/kubernetes-security-announce/c/avaRYa9c7I8\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://github.com/kubernetes/ingress-nginx/issues/8686\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-03T20:11:28.404Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-25748\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-01-16T21:23:23.823577Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-01-16T21:23:31.364Z\"}}], \"cna\": {\"title\": \"Ingress-nginx `path` sanitization can be bypassed with newline character\", \"source\": {\"defect\": [\"https://github.com/kubernetes/ingress-nginx/issues/8686\"], \"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"value\": \"Gafnit Amiga\"}], \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.6, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"Kubernetes\", \"product\": \"Kubernetes ingress-nginx\", \"versions\": [{\"status\": \"affected\", \"version\": \"unspecified\", \"lessThan\": \"1.2.1\", \"versionType\": \"custom\"}]}], \"datePublic\": \"2022-06-10T00:00:00\", \"references\": [{\"url\": \"https://groups.google.com/g/kubernetes-security-announce/c/avaRYa9c7I8\"}, {\"url\": \"https://github.com/kubernetes/ingress-nginx/issues/8686\"}], \"x_generator\": {\"engine\": \"Vulnogram 0.0.9\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use a newline character to bypass the sanitization of the `spec.rules[].http.paths[].path` field of an Ingress object (in the `networking.k8s.io` or `extensions` API group) to obtain the credentials of the ingress-nginx controller. In the default configuration, that credential has access to all secrets in the cluster.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-20\", \"description\": \"CWE-20: Improper Input Validation\"}]}], \"providerMetadata\": {\"orgId\": \"a6081bf6-c852-4425-ad4f-a67919267565\", \"shortName\": \"kubernetes\", \"dateUpdated\": \"2023-05-24T00:00:00\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2021-25748\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-01-16T21:23:39.341Z\", \"dateReserved\": \"2021-01-21T00:00:00\", \"assignerOrgId\": \"a6081bf6-c852-4425-ad4f-a67919267565\", \"datePublished\": \"2023-05-24T00:00:00\", \"assignerShortName\": \"kubernetes\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…